[TYPO3] Data structure selector content missing in flexible content element

[Hans van Dijk]

L.S.,

Something is wrong with my Templavoila installation (Typo3 4.0.6. TV  
1.3.1).
I can not select a data structure anymore in a Flexible Content Element.
When I create e new content element with the New Content page wizard,  
the FCE's do not show up in the page, so I can not select one anymore.

In the previously created Flexible Content Elements, I get a value of  
[INVALID VALUE ("3")].
In the frontend all looks well! Even if I put an excisting value of a  
TV object in the "tx_templavoila_ds" and "tx_templavoila_to"  columns  
in a new tt_content record, everyting goes well in the frontend and  
in the BE. I can put in the values in the fce elements in the BE and  
it shows in the FE, but the [INVALID VALUE ("3") stays in the  
selector box.

It seems like a relation or a reference to a relation is disappeared!?
Anyone knows in which table to look for missing records?

Thank you in advance...

Regards, Hans